2009537 has 2 divisors, whose sum is σ = 2009538. Its totient is φ = 2009536.

The previous prime is 2009509. The next prime is 2009543. The reversal of 2009537 is 7359002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1430416 + 579121 = 1196^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 2009537 - 2¹² = 2005441 is a prime.

It is not a weakly prime, because it can be changed into another prime (2009437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004768 + 1004769.

It is an arithmetic number, because the mean of its divisors is an integer number (1004769).

2^2009537 is an apocalyptic number.

It is an amenable number.

2009537 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009537 is an equidigital number, since it uses as much as digits as its factorization.

2009537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 2009537 is about 1417.5813909614. The cubic root of 2009537 is about 126.1920519606.

The spelling of 2009537 in words is "two million, nine thousand, five hundred thirty-seven".